Liquid-soap dispenser



1. M. DABROWSKI. LIQUID SOAP DISPENSER. APPLICATION FILED SEPT. 9| I9I9.

1,349, 121-. Patented Aug. 10, 1920.

UNITED STATES PATENT OFFICE.

ASSIGNOR TO MOORE BROTHERS A CORPORATION OF NEW YORK.

LIQUID-SOAP DISPENSER.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application filed September 9, 1919. Serial No. 322,636.

To all whom t may concern:

Be it known that I, JOSEPH M. DABROW- siii, a citizen of the United States, residing at the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Liquid-Soap Dispensers, of which the following' is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

My invention relates to liquid soap dispensers, and more particularly toa struc-` ture of this character of the So-called pushin7 type wherein the delivery of the soap is eected through the action of a plunger] valve which is arranged substantially horizontally and is acted upon by a spring so as to be ready for use at all times.

In dispensers of this type considerable difficulty has heretofore been encountered in securing a suificiently rapid feed of the soap to the delivery mechanism, to permit the repeated operations of the plunger in rapid succession, while so limiting the quantity of soap delivered as to secure the desired economy in the use of the dispenser. To secure the desired result, the construction must besuch that the discharge of the soap will be effected under air pressure developed by the inward movement of the valve plunger, this pressure being relieved during the short interval of delivery, so that the return movement of the plunger will create sufficient suction to insure instantaneous recharging of the delivery mechanism with themaXimum quantity of liquid soap to be delivered upon `the succeeding actuation of the plunger.

VIn addition to Vthis characteristic, I so construct the plunger and its casing, that a limited quantity of soap will be stored in a Small chamber between the pressure lchamber and the Outlet nozzle so asto be in the path of the air moving from said chamber toward said outlet, thus securing the threefold eifect of limiting the quantity of soap delivered tothat contained in said storage chamber, securing a forceful ejection of such soap, Yand relieving the pressure in said chamber during'that brief interval while the soap is being delivered, thus' permitting the lreturn movement of the plunger to develop suiiicient suction to cause the liquid soap to rapidly flow from the reservoir to said storage chamber, but avoid its flooding the valve casing.

The invention consists primarily in aliquid soap dispenser embodying therein a cylindrical casing having a discharge nozzle leading therefrom at a point intermediate the ends thereof, and an intake port in advance of said nozzle, a reservoir for liquid soap surmounting said casing and communicating therewith through said intake port, a reciprocatory piston mounted in said casing, having a peripheral groove adapted to receive a limited quantity of soap and dividing said piston into two valves, one operative in relation to said nozzle and the other operative in relation to said intake port, said piston also having an air passage opening into said casing and into said groove, a'spring acting upon said piston and normally maintaining said peripheral groove in communication with said intake port and causingr one of said valves to close said discharge nozzle, and a stem whereby said piston may be actuated; and in such other novel features of construction and combination of parts as are hereinafter set forth and described and more particularly pointed out in the claims hereto appended.

Referring to the drawings,

Figure l is a side vview of a dispenser embodying my invention, partly in section and partly in elevation;

Fig. 2 is a sectional view of the plunger valve, and A Fig. 3 is a plan view of the metallic top structure of the reservoir.

Like letters refer to like parts throughout the Vseveral views.

In the embodiment of my invent-ion shown in the drawings, I employ a cylindrical valve casing a having a straight bore e-X- tending longitudinally thereof, said casing being provided with a discharge nozzle Z), the opening of which extends at an angle, as shown, toward the outer end of the casing.

Communicating with the bore Vof said casing is an intake port c Aoflset with relation to'said discharge nozzle Z9 so thatthe delivery mechanism may be so constructed as to receive` a charge of liquid soap and deliver same, alternately, thus limiting the quantity of soap delivered with each actu ation of saidmechanism and preventing the leakage of soap when the device is notrin use.VV 4 e Surmounting'the casing a is a reservoir consisting'of` a metallic cup d into which the intake port c opens. This cup has interior screw threads, as shown, which coperate with screw threads upon the neck c of the glass container e, suitable cement being used between said neck and said cup to insure a permanent, liquid-tight joint at this point. The'cup d may be cast integrally with the casing a, or assembled in any desired manner therewith, this being merely a matter of mechanical expediency.

The container e has a reduced, open top having an external bead c2 upon which is crimped a metallic closure plate f'having a filling opening f therethrough. Botatably mounted upon the plate f by means of the central pivot f2 is a cover plate g havinga filling opening g therethrough adapted to be brought into register with the opening f', to permit the container to be filled, or out-vof register therewith to close the container after it has beenilled.

The container e, for sanitary purposes is made of glass, transparent glass preferably being used so that the level of the soap therein may be observed at all times.

Mounted in the bore of the casing a is a reciprocatory plunger or piston Hehaving a peripheral groove L in the length thereof which groove in addition to being adapted to' receive a' limited quantity of soap, divides said plunger or piston into two distinct valves /t-,t2, the first of which is Voperative in relation tothe opening of the nozzle b and the other of which is operative .in relation to the intake port c, said groove being sopositioned that it will alter- V'nately x register with said intake port, and with said nozzle, but will never establish ycommunication therebetween.

VThe plungerl or piston has an air passage n therein one end. of which opens into said casing andthe other end of which opens into said groove, said passage in the form of the invention shown comprising a longitudinally extending bore z' which is in communication with the groove h through al small port s Said plunger-or piston has. a stem j projecting through an opening in the screw lcap a., which latter `closes the outer end of the casing a. The stem j has a suitable push button j :having a face of porcelain, or other material which may be readily cleansed. 1 f

Seated between the plunger or pistonk H andthe endof. the bore of the casing a is a spring 'le having a normal tendency to thrustsaid plunger or piston outwardly unt1l stoppedfby the capa', and thus normally place the groove h in registerv with the port the Yopening in the discharge nozzle b.

The valve casing a is provided with a flange a2 by means of which the device may be supported from a wall; Any other desired form of support may be used, however.

VThe operation of the herein describedi soapdispenser is substantially as follows:

In filling, the container, or reservoir e, the plate g is turned until the opening g registers with the opening f in the plate j", the said plate g being` again turned to close said opening f after the containeris lled, so as vto lexclude dust, dirt and moisture from said container. The methody of iilling the container, however, is immaterial to the invention. Y

Under normal, conditions, the spring k will maintain the plunger or piston H in the position' shown in Fig. 1, with the valve h closing the opening of the nozzle Z9 and the groove h in communication with the E,intake port c. When the parts are in this relation, the pressure within the casing a and the container will be atmospheric so that the liquid soap w-illreadily flow from the said container into and about the groove h, but being somewhat viscous, will not flow through the port 'i'. VHence,each time the plunger or piston H'reaches this position, the quantity of soap withdrawn from said container will befrepresented by the capacity-of the said groove 7L, none of the soap flowing to within the bore z'.

Vhen dispensing the soap, the plunger H is forced inwardly against the tension of Vthe spring/c, the first stage of this movement causing the valve 71,2 to close the port c; the second stage slightly compressing the air within the casing a andthe final stage bringing the groove h into register with the opening of the nozzle ZJ.v This permits the soap contained inthe groove to be discharged eitherin whole or in part through said nozzle,` as theY result of ztherexpansion ofthe compressed air'within the casing a, said air flowingrfrom within said casing to within said groove, through the'bore e' and the port e lnthis manner, each time the plunger or piston H is forced or'pushed inwardly of the casinga, only a' small quantity of soap will be delivered, the flow of soap from the container e beingV prevented by the valve 71,2 while said groove L is in aposition where spapV may flow therefrom through the nozze@ In addition to soap being delivered in the manner described, thel'air pressure within the casing a will be relieved, sothat upon the return movement of the plunger or piston, H, under the iniuence of the'spring la, a suction isrdeveloped by said plunger or piston, .but only after the valve h has closed the nozzle opening. Since the stroke of the plunger or piston is short, this suction will not be great, but it will be suiiicient to cause the soap to flow rapidly into the groove it from the container e so that notwithstanding quickly repeated thrusts of said plunger or piston, soap in substantially the same quantity will always be delivered.

By the construction described, the groove i1, will be brought into register with the intake port c and with the discharge nozzle alternately, said intake port being closed by its valve while said groove is in register with said nozzle, and said nozzle being closed by its valve while said groove is in register with said intake port.

The valve will be lubricated and packed against the low pressure, by the soap, so that a sufliciently tight fit of the plunger may be securedto prevent leakage.

It is not my intention to limit the invention to the precise details 01"" construction shown in the drawings, it being apparent that such may be varied without departing from the spirit and scope of the invention.

Having described the invention, what l claim as new and desire to have protected by Letters Patent, is

l. A liquid soap dispenser embodying therein a cylindrical valve casing having a Vdischarge nozzle leading therefrom at a point intermediate the ends thereof, and an intake port arranged in advance of said nozzle, a reservoir for liquid soap surmounting said casing and communicating therewith through said intake port, a reciprocatory piston mounted in said casing and having a peripheral groove adapted to receive a limited quantity of soap and dividing said piston into two distinct valves, one operative in relation to said nozzle and the other operative in relation to said intake port, said piston also having an air passage opening into said casing and into said groove, a spring acting upon said piston and normally maintaining said peripheral groove in communication with said intake port and causing one of said valves to close said discharge nozzle, and a stem whereby said piston may be actuated.

2. A liquid soap `dispenser embodying therein a cylindrical valve casing having a discharge nozzle leading therefrom at a point intermediate the ends thereof, and an intake port arranged in advance of said nozzle, a reservoir ior liquid soap surmounting said casing and communicating therewith through said intake port, a reciprocatory piston mounted in said casing, having a peripheral groeve adapted to receive a limited quantity oi soap, and dividing said piston into two distinct valves, one operative in relation to said nozzle and the other operative in relation to said intake port, said piston having a longitudinally extending bore therein and a port leading from said bore and opening into said groove, a spring in said casing and acting against said piston to normally maintain said peripheral groove in communication with said intake port and to cause one oli said valves to close said nozzle, and a stem whereby said piston may be actuated.

In witness whereof, I have hereunto aflixed mysignature, this 26th day of August, 1919, in the presence of two subscribing witnesses.

JOSEPH M. DABROVSKI. Witnesses:

F. T. WENTWORTH, E. BRADFORD. 

